Non negative pressure variable frequency secondary water supply equipment

Non negative pressure water supply equipment is a development and extension of variable frequency constant pressure water supply equipment, which uses the municipal pipeline network as the water source, fully utilizes the existing pressure of the municipal pipeline network, and forms a closed continuous relay pressurized water supply method. It has good energy-saving effect and no secondary pollution of water quality. Directly stacking water supply on the basis of municipal pipeline pressure saves energy, and also has many advantages such as fully enclosed, pollution-free, small land occupation, fast installation, reliable operation, and easy maintenance.

The use of non negative pressure variable frequency secondary water supply equipment allows water from the tap water network to enter the steady flow tank, and the air inside the tank is discharged from the vacuum eliminator. After the water is filled, the vacuum eliminator automatically shuts off. When the pressure of the tap water network can meet the water requirements, the system supplies water directly to the water network through a bypass check valve; When the pressure of the tap water network cannot meet the water requirements, the system pressure signal is fed back to the variable frequency controller through a remote pressure gauge. The water pump runs and automatically adjusts the speed and constant pressure water supply according to the amount of water used. If the running water pump reaches the power frequency speed, another water pump will start variable frequency operation. When the water pump is supplying water, if the water volume in the tap water network is greater than the flow rate of the water pump, the system maintains normal water supply: during peak water usage, if the water volume in the tap water network is less than the flow rate of the small pump, the water in the stabilizing tank can still supply water normally as a supplementary water source. At this time, air enters the stabilizing tank through a vacuum eliminator, and the vacuum inside the tank is destroyed, ensuring that the tap water network does not generate negative pressure. After the peak water usage, the system returns to normal water supply. When the water supply network is shut down, causing the liquid level in the stabilizing tank to continuously decrease, the liquid level detector will feedback the signal to the variable frequency controller, and the water pump will automatically stop to protect the water pump unit.